Tool joint



Patented sept. 9, 1924.

UNITED sfmjrrzs ROBERT `A. WILSON, or DALLAS, rExAaAs'smNon, 'ro euIBEnsoN marokanen, or

' lDALLAS, TEXAS, A comonA'rIoN or DELAWARE.

' lrooL Jonrr..

\'Appimmon manne s, 192i. fsu-iai van. 475,470,

To all whom t may concern:

Be it knownthat I, ROBERT A. WILSON, a citizen of the United States, residing at Dallas, in the county of Dallas and State of Texas, have invented certain new and useful Y Improvements in.T ool Joints, of which' the boring tubings.

following is a specification. This invention relates to new and useful lmprovements in tool yjoints for rotary well The inventlon improvements in the type of joint which employsa box and tapered pin, such 'as is illustrated in the patent to Whittier, issued July 12, 1910, No. 964,3535 By employing the tapered pin and a corresponding seat for the same in thebox, the parts of the joint may be disconnected by rotating the pin four or five complete turns. However, while this is an improvement it still consumes considerable time todisconnect the joint in a string of tubingmeasuring two or three thousand feet.

vThe object of my invention is to provide a tool joint which may be disconnected immediately b giving thereto only a quarter turn,and t us saving a great amount'of time andlabor. vAnother feature of the in.

vention resides in the provision of double threads,starting and.A ending diametrically` opposite each other, whereby the advantage of 'a cross stitch is vhad and the area of a fine thread is obtained. l g

4An important and essential feature of the invention resides in the provision of a complete thread at the bottom of the seat which receives and supports the mutilated threads has .particularly to do vwithinvention,laportion being shownA ,in elevation and a portion in section, y

Flg. 2 1s a view offa boxconstructed 1n accordance with my invention, -a portion being shown in elevation and a portion vin ..11

section,

FV 3 is an undersidegview nof the pin mem er, and j Fig. 4 is a plan "viewof the box."

In the drawings the numerallO designates a pin member which has 'a screw threaded socket 11 in its upper end to receive the usual screw threaded well tubing 12. The mem' Ber is provided with a longitudinal bore 13. `The member 10 constitutes one lportion or element of the'joint and abox 14 constitutes."

the other element. 'Theflower end of thel box 14 is provided with a screw threaded socket 15 receiving the screw threaded end .of the well ,tubing.16. The box has a longitudinal bore 17. The member'v 10 andv box 14 are screwed onto the tubing. sections 12 and v16 in the usual manner, the threads being comparatively fine and the parts tapered as is a common practice. In using the joint the member and box are not'unscrewe'd fromv the tubing sections, but remain thereon.

mutilated threads 20 arranged in panels occupyin substantially' one quarter of the area of t e pin, and disposed on opposite n Thev member l() is provided witha dependsdes, whereby gaps are provided between the thread panels also diametrically arranged. In forming the threads the pin 'is of the pin so as to guide the latter into thev provided with la coarse thread, the convolu- Y gether with other features of the invention.

The invention will be more readily understoo from a reading of the following specicat1on and by reference to the accompan ing drawings, in which an example of t e A invention is shown and wherein: y

Fig. 1 is a view 'of a pin member of a joint constructed in accordance with my tions of which are spacedL sufficiently to ad-` mit the ,forming-of a second .threadof the same pitch intermediate said convolutions.

i The second thread is started -diametrically opposite from the firstthread. From the foregoin threads gins at the lower end of the said panel on one side of the pin, while the other thread: begins at the lower end of` the said panel onjthe othervside of the pin. By this aran ement a coarse -thread 'is'provided but the avantage of the area or bearing surface of' a yEne thread is had.

, The seat 19 isprovided with threads 21 which are mutilated and formed into dia- `metrically opposed panels having substantially the `same width as the gaps between it will Vbe seen that fone of the the threads of the pin, so that the pin may be inserted into the seat and the thread panels received in the gaps between the threads laterally directedshoulder 25 having a fiat der 24 at the bottom of the seat 19. y

of the box. It is merely necessary to insert `the pin in the seat 1 9 and to giv'ethe'member 10a quarter turn, whereby the threads` 21 'ride into threads 22 and couple the parts' of the joint together. ,l

It is pointed out, however, that some means must .be provided for lguiding the blunt ends of the threads 20, between the threads 21, otherwise the ends Aof said threads would abut and prevent'threading. To -`.care for this I provide at the bottom of the seat continuous threads 22, one for each It will be seenthat when the .pin is in.;l

serted in `the seatl of the box,the Ilowestthread 20 will rest on the continuous thread 22 and when the'pin is given a. quarter turn the threads 20 will ride into the threads 21- smoothly and easily'. The rotation of the pin is limited by the engagement of the bev?y eled end 23 with the shoulder 24, which pro.-

Alse` thev duces a slight. wedging action. upperl end of the Vpin is surrounded bya v'turn of the pin. f

face which .comes to restv on top of the nished upper surface 26 of the box 'when the ,partsare brought together.

The bore`13 also extends thru the pin 18 and registers withthe bore 17 when thejoint.

is coupledtogether. It Iwill be seenthat the readily unscrew from the box. However,

when it is .desired to disengage .the parts, it

will only benecessary to give the member`10 a quarterturn vin order tolift the pin from the seat 19. Any suitable marks may be employed for indicating when the 'member vhas been turned -far enough toWthdraw the threads 20 from the threads 21. What I claim, is:v

4o kfrictiona'll contacts provided between the Aparts 23 and 24 and 25`and 26 will be conv siderable and, therefore, the pin will not A rotary well boring box and pin comprising the combination of a pin havingy double-threads arranged in spaced panels on diametrically opposite sides thereof, saidn a box having a socket shaped to receive said pinl and` provided with double threads arranged in panels to mesh with the panels of the pin, each of the double threads upon the pin riding upon a continuous thread at the bottom of the socket, whereby the-panels of the pin and'box are meshed In testimony whereof I ai'x my signature.

1 ROBERT A. WJLsoN.

vupon quarter pin having a .shoulder at its upper end, and 4 

